---
title: "Acala / Karura Sandwich Attack Dashboards"
output:
  flexdashboard::flex_dashboard:
    orientation: rows
    vertical_layout: scroll
    social: menu
    source_code: embed
params:
  network: Karura
  window: 30
---

```{css custom1, echo=FALSE}
.dataTables_scrollBody {
    max-height: 100% !important;
}
```

```{r global, include=FALSE}

knitr::opts_chunk$set(
  message = FALSE,
  warning = FALSE,
  comment = "#>"
)

library(kableExtra)
library(formattable)
library(lubridate)
library(flexdashboard)
library(DT)
library(dygraphs)

# Helper function to concat
`%+%` <- function(a, b) paste0(a, b)



# remotes::install_github("ropensci/ghql") # if package is not already installed
library(jsonlite)
library(data.table)
library(ghql)
x <- GraphqlClient$new()


window <- params$window
endpoint <- params$endpoint
network <- params$network

if (network == 'Acala') {
  
  dex_endpoint <- "https://api.subquery.network/sq/AcalaNetwork/acala-dex"
  loan_endpoint <- "https://api.subquery.network/sq/rogerjbos/acala-loan-subql"
  swap_endpoint <- "https://api.subquery.network/sq/rogerjbos/acala-swap-day-data"
  official_endpoint <- "https://api.subquery.network/sq/AcalaNetwork/acala"
  
} else {

  dex_endpoint <- "https://api.subquery.network/sq/AcalaNetwork/karura-dex"
  loan_endpoint <- "https://api.subquery.network/sq/rogerjbos/karura-loan-subql"
  swap_endpoint <- "https://api.subquery.network/sq/rogerjbos/karura-test"
  official_endpoint <- "https://api.subquery.network/sq/AcalaNetwork/karura"

}

getSwapsDex <- function(endpoint, window) {
  # endpoint <- dex_endpoint; window <- 10
  
  # make a client
  cli <- GraphqlClient$new(url = endpoint)
  mindate <- today(tzone = 'UTC') - window
  
  cursor <- ''
  resList <- list()
  for (i in 1:1000) {
    if (cursor == '') {
      cursorStr <- 'first:100'
    } else {
      cursorStr <- 'first:100 after:"' %+% cursor %+% '"'
    }
    qry <- Query$new()
    qry$query('swaps', '
    {
      query {
        swaps (filter: {timestamp: {greaterThanOrEqualTo: "' %+% mindate %+% '"}} ' %+% cursorStr %+% ') {
          totalCount
          edges {
            node { 
                id address {
                  id
                } pool {
                  id
                }  token0 {
                  id
                } token1 {
                  id
                } token0InAmount token1OutAmount
							  tradePath price0 price1 block {
							    id
							  } extrinsic {
							    id
							  } timestamp
            }
            cursor
          }
          pageInfo {
            endCursor
            hasNextPage
          }
        }
      }
    }')
    result <- cli$exec(qry$queries$swaps)  %>%
      fromJSON(flatten=TRUE)
    cursor <- result$data$query$swaps$pageInfo$endCursor
    res <- as.data.table(result$data$query$swaps$edges)
    res[, cursor := NULL]
    
    print(i %+% " " %+% nrow(res))
    resList[[i]] <- res
    if (result$data$query$swaps$pageInfo$hasNextPage == FALSE) break
  }
  res <- rbindlist(resList)
  setnames(res, old = names(res), new = gsub("node.", "", names(res)))
  
  if (substr(max(res$timestamp), 12, 13) < 23) {
    maxdate <- as.Date(max(res$timestamp))-1
  } else {
    maxdate <- as.Date(max(res$timestamp))
  }
  
  res <- res[timestamp <= maxdate]
  res[, date := as.Date(timestamp)]
  setorder(res, timestamp)
  
  # Replace foreign assets
  res[, token0.id := subscanr::fixToken(token0.id)]
  res[, token1.id := subscanr::fixToken(token1.id)]

  # Normalize pairs
  res[, pair := paste0(token0.id %+% ":" %+% token1.id)]
  res[token1.id < token0.id, pair := paste0(token1.id %+% ":" %+% token0.id)]
  res[, exclude := token0.id == token1.id]
  res  
  
}


# queries ####
# swaps2 <- getDailyPoolsQuery(dex_endpoint, window)
swaps <- getSwapsDex(dex_endpoint, window)

swaps <- merge(swaps, subscanr::tokens, by.x='token0.id', by.y='Token') %>% setnames("decimals","decimals0")
swaps[, Name := NULL]
swaps <- merge(swaps, subscanr::tokens, by.x='token1.id', by.y='Token') %>% setnames("decimals","decimals1")
swaps[, Name := NULL]

swaps[, adj0 := as.numeric(substr(as.character(1e20),1, as.numeric(decimals0) + 1))]
swaps[, adj1 := as.numeric(substr(as.character(1e20),1, as.numeric(decimals1) + 1))]

swaps[, token0InAmount := as.numeric(token0InAmount)]
swaps[, token1OutAmount := as.numeric(token1OutAmount)]
swaps[, price0 := as.numeric(price0) / 1e18]
swaps[, price1 := as.numeric(price1) / 1e18]

swaps[, amount0 := token0InAmount / adj0]
swaps[, amount1 := token1OutAmount / adj1]

swaps[, token0.id := subscanr::fixToken(token0.id)]
swaps[, token1.id := subscanr::fixToken(token1.id)]
swaps[, tradePath := subscanr::fixToken(tradePath)]
swaps[, pathLength := length(strsplit(tradePath, ",")[[1]]) - 1, by = id]

swaps[, volume0USD := amount0 * price0]
swaps[, volume1USD := amount1 * price1]
swaps[, volumeUSDFloat := (volume0USD + volume1USD) / 2]
swaps[volume0USD == 0 & volume1USD > 0, volumeUSDFloat := volume1USD]
swaps[volume1USD == 0 & volume0USD > 0, volumeUSDFloat := volume0USD]

mysort <- function(a, b) ifelse(a < b, a %+% ":" %+% b, b %+% ":" %+% a)

getPath <- function(tradePath) {
  # tradePath <- swaps[1]$tradePath
  tp <- strsplit(tradePath, ",")[[1]]
  n <- length(tp) - 1
  if (n == 3) {
    return(list(mysort(tp[1],tp[2]), mysort(tp[2],tp[3]), mysort(tp[3],tp[4])))
  } else if (n == 2) {
    return(list(mysort(tp[1],tp[2]), mysort(tp[2],tp[3]), "NA:NA"))
  } 
  list(mysort(tp[1],tp[2]), "NA:NA", "NA:NA")
}
swaps[, c("pair1", "pair2", "pair3") := getPath(tradePath), by = id]

swaps[, fee := volumeUSDFloat * .03]
swaps[, feeAdj := volumeUSDFloat * .03 * pathLength]
setnames(swaps, "address.id", "accountId")


index <- strsplit(swaps$id, "-")
index <- do.call("rbind", index)
myindex <- as.numeric(index[, 2])
swaps[, index := myindex]
setorder(swaps, block.id, index)

starti <- 1829970 #  min(swaps$block.id) #
endi <- max(swaps$block.id)


j <- 1
d <- list()
prof <- list()
for (i in starti:endi) {
  # i <- 1829970
  tmp <- swaps[block.id == i]
  tmpn <- tmp[, .N, by = 'accountId']

  # Look for the same account number 2 times in the same block
  if (nrow(tmpn) >= 2 && max(tmpn$N) >= 2) {
    acct <- tmp[, .N, by = 'accountId'][N >= 2, accountId]
    for (account in acct) {
      # account <- acct[1]
      for (ii in 1:(nrow(tmp) - 2)) {
      
          if (tmp$token0.id[ii] == tmp$token1.id[ii+2] && 
              tmp$token1.id[ii] == tmp$token0.id[ii+2] && 
              tmp$accountId[ii] == tmp$accountId[[ii+2]] &&
              tmp$accountId[ii] != tmp$accountId[[ii+1]] &&
              length(grep(tmp$token0.id[ii], tmp$tradePath[ii+1])) > 0 && 
              length(grep(tmp$token1.id[ii], tmp$tradePath[ii+1])) > 0) {
            d[[j]] <- tmp[, .(block.id, index, token0.id, token1.id, tradePath, token0InAmount, token1OutAmount, price0, price1, timestamp, accountId)][ii:(ii+2)] 
            prof[[j]] = data.table(block.id = tmp$block.id[ii], time = tmp$timestamp[ii], attacker = tmp$accountId[ii], target = tmp$accountId[ii+1], profit = as.numeric(tmp$token1OutAmount[ii+2]) - as.numeric(tmp$token0InAmount[ii]), currency = tmp$token0.id[ii])
            j <- j + 1  
          }
      } # end for ii
    } # end for account
  }
}
out <- rbindlist(d)
p <- rbindlist(prof)
output <- unique(p)
output[, profit := profit / 1e12]
output[, attacker := substr(attacker, 1, 8) %+% "..."]
output[, target := substr(target, 1, 8) %+% "..."]

```

### `r network` sandwich attacks in the past 30 days

```{r plot, result='asis', out.height = 12}

dygraph(output[, .N, by = as.Date(time)], main = network %+% " Sandwich Attacks") %>% 
        dyStackedBarChart()

```

```{r table}

knitr::kable(output, escape = FALSE) %>%
  kable_styling()

```

Last updated: `r Sys.time()`

Date range of data: `r min(swaps$timestamp)` to `r max(swaps$timestamp)`.

Sources: 

* [SubQuery Network](https://explorer.subquery.network/)

Swaps:

* [Acala-Swap-Day-Data](https://api.subquery.network/sq/rogerjbos/acala-swap-day-data)

* [Karura-Swap-Day-Data](https://api.subquery.network/sq/rogerjbos/karura-swap-day-data)